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Bacteria are sorted into two major groups depending on their color after being treated with a dye.

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How is gram stain used in an experiment involving bacteria?

Bacteria are sorted into two major groups depending on their color after being treated with a dye.


Do acid-fast bacteria stain gram-negative when subjected to the gram stain?

No, acid-fast bacteria do not stain gram-negative when subjected to the gram stain.


What is the gram stain of H5N1?

The Gram stain is used for bacteria and not for viruses.


Does yogurt stain gram positive or gram negative?

Yogurt contains mostly lactic acid bacteria, which are Gram-positive bacteria. This means they will stain purple under a Gram stain.


What does gram negative on a serratia marcescens gram stain mean?

Bacteria are gram positive or gram negative. Serratia happens to be a gram negative bacteria. They appear pink on a gram stain. Gram positive bacteria stain to a purple color on a gram stain. We can classify and ID bacteria using their gram stain and shape. Some antibiotics only work on gram negative bacteria and some only work on gram positive bacteria. It helps a doctor know which antibiotic to use.


What is the Gram stain for measles?

Bacteria stain either gram-positive or gram-negative based on the presence or absence of a cell wall. Viruses do not pick up a gram stain.


Gram stain of the bacteria vibrio cholerae?

It's gram negative


Does the gram stain procedure work for all bacteria?

Yes. The gram stain procedure separates all bacteria into one of two groups - into gram-negative bacteria which do not stain purple and into gram-positive cells which do stain purple. In structural terms, the ability of a cell to become stained during the gram stain procedure is due to the chemical makeup of the cell wall.


Did your results agree with the gram stain information in your text book?

Yes, the results agreed with the gram stain information in the textbook. The gram stain showed purple color for Gram-positive bacteria and pink color for Gram-negative bacteria, confirming their respective characteristics.


What is the advantage of the gram stain over the simple stain?

gram staining differentiates between gram negative and gram positive bacteria by showing different colors. it shows blue or purple like color for gram positive bacteria and red color for gram negative bacteria. where as simple stain gives the same color to all the types of bacteria. hence it is difficult to differentiate between them.


What color is Gram- stain?

Gram- negative bacteria turns red to pink after the gram stain is performed.


What is the different reaction of Gram-negative and Gram-positive bacteria to Gram's stain testing?

Gram-positive bacteria retain the crystal violet stain and appear purple when stained with Gram's stain, because the thick peptidoglycan layer in their cell wall traps the dye. On the other hand, Gram-negative bacteria do not retain the crystal violet stain and appear red or pink after the addition of a counterstain like safranin, due to their thin peptidoglycan layer which is unable to retain the dye.